Power problem or motherboard
Posted on 2005-05-15
I am workng on a computer that has a power problem. The owner told me that it was working fine the other night and he shut it down and when he went to start it the morning all he would get is a momentary light on the cd and nothing. I hooked up a known good power supply and when I turned it on all that would happen is a 2 second spin on the cpu fan and the case fan. I changed the switch and no change. I will often will get the same spin when just plugging in the power supply which I have seen before and believe that is normal??. If I use the switch I will get the short fan spin but will not spin again until I unplug the power supply and let it rest a short while plug it back in and then 1 spin with 1 click of the switch with nothing if I hit the switch again. Unplug the PS and I will get 1 short spin again.
I started by unhooking power from the cd , hdd, floppy, case fan (which will also spin for 2 seconds), and the sound card wire. No change. I changed the cpu fan and still no change. At this point I have the mobo on my workbench with just a PS , switch, cpu fan and a stick of ram which I also changed out for a new one.
Am I missing something? the guy keeps calling for and update.
Mobo is an ECS K7s5a ver3.PC is a clone. PS is a TigerPro TP300, Memory is SD 2700 (512)
I don't know the cpu speed but it will take a 1.4 Amd athlon and he did say he had someone upgrage his computer a short while back so I am assuming it is probably the max.
Anything else you guys can think of?